118 
SELACHII. 
(iii.) Barton Clay, Barton Cliff. 
P. 1500. Connected series of 12 median teeth, with two lateral rows 
on each side. Egerton Coll. 
(iy.) Lower Eocene, near Brussels, Belgium. 
42856. Connected series of six median teeth, with two lateral rows. 
Van Breda Coll. 
P. 1510. Era gment of dentition, showing three lateral rows of teeth. 
Egerton Coll. 
Myliobatis latidens, A. S. Woodward. 
1888. Myliobatis latidens , A. S. W T oodward, Ann. Mag. Nat. Hist. [6] 
vol. i. p. 45, pi. i. figs. 11, 12. 
Type. Lower dentition; British Museum. 
A small species. Coronal contour of lower dentition flat, that of 
the upper only slightly transversely arched. Median teeth in adult 
not less than eight times as broad as long; lateral teeth at least as 
broad as long. 
Form. Loc. Bracklesham Beds (Middle Eocene): Sussex. 
25630 a. One of the type specimens; figured, loc. cit. pi. i. fig. 12. 
Dixon Coll. 
P. 1507 g. Second type specimen; figured, loc. cit. pi. i. fig. 11. 
Egerton Coll. 
25630, 25637, 25672. Three similar specimens, the second showing 
two series of lateral teeth on each side. Dixon Coll. 
P. 1506 a. Abraded series of six median teeth of large individual; 
referred to, loc. cit. p. 46. Egerton Coll. 
25656. Portion of upper dentition doubtfully assigned to this species; 
figured, loc. cit. pi. i. fig. 13. Dixon Coll. 
The two species M. gyratus and M. jugalis, ascribed by Agassiz 1 
to the London Clay of Sheppey, are probably founded upon the 
abraded dentition of one of the foregoing species. 
Myliobatis stokesii, Agassiz. 
1843. Myliobatis stokesii, L. Agassiz, Poiss. Foss. vol. iii. p. 318, pi. xlvii. 
figs. 1, 2. 
Type. Half of lower dentition; British Museum. 
Crown of median tooth very thick, though flattened, in the middle 
1 Poiss. Foss. yol. iii. 1843, pp. 323,324, pi. xlyi. figs. 1-3, pi. xlvii. figs. 13,14. 
